/**
 *    Copyright (C) 2012 ZeroTurnaround LLC <support@zeroturnaround.com>
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package com.zhs.gccs.utils.zip;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.ZipEntry;

/**
 * @author Toomas Romer
 * @author shelajev
 * @author Innokenty Shuvalov
 */
public class FileSource implements ZipEntrySource {

	private final String path;
	private final File file;

	public FileSource(String path, File file) {
		this.path = path;
		this.file = file;
	}

	public String getPath() {
		return path;
	}

	public ZipEntry getEntry() {
		ZipEntry entry = ZipEntryUtil.fromFile(path, file);
		return entry;
	}

	public InputStream getInputStream() throws IOException {
		if (file.isDirectory()) {
			return null;
		}
		else {
			return new BufferedInputStream(new FileInputStream(file));
		}
	}

	public String toString() {
		return "FileSource[" + path + ", " + file + "]";
	}

	/**
	 * Creates a sequence of FileSource objects via mapping a sequence of files
	 * to the sequence of corresponding names for the entries
	 * 
	 * @param files
	 *            file array to form the data of the objects in the resulting
	 *            array
	 * @param names
	 *            file array to form the names of the objects in the resulting
	 *            array
	 * @return array of FileSource objects created by mapping given files array
	 *         to the given names array one by one
	 * @throws IllegalArgumentException
	 *             if the names array contains less items than the files array
	 */
	public static FileSource[] pair(File[] files, String[] names) {
		if (files.length > names.length) {
			throw new IllegalArgumentException("names array must contain " + "at least the same amount of items as files array or more");
		}

		FileSource[] result = new FileSource[files.length];
		for (int i = 0; i < files.length; i++) {
			result[i] = new FileSource(names[i], files[i]);
		}
		return result;
	}
}
